Polarization indications for synchronization signal block, coreset, and beam footprint

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a polarization of at least one synchronization signal block (SSB). The UE may determine a polarization of another beam based at least in part on the indicated polarization. Numerous other aspects are provided.

What is claimed is: 
     
         1 . An apparatus for wireless communication at a user equipment (UE), comprising:
 a memory; and   one or more processors coupled to the memory, the one or more processors configured to:
 receive an indication of a polarization of at least one synchronization signal block (SSB); and 
 determine a polarization of another beam based at least in part on the indicated polarization. 
   
     
     
         2 . The apparatus of  claim 1 , wherein the one or more processors, to receive the indication, are configured to receive the indication in a system information block. 
     
     
         3 . The apparatus of  claim 2 , wherein the indication associates a polarization with each beam of one or more beams, and wherein each beam is identified by one or more of a synchronization signal block index, a satellite beam index, a physical cell identity, or a satellite index. 
     
     
         4 . The apparatus of  claim 1 , wherein the one or more processors are configured to receive at least one SSB in a beam with the indicated polarization, and wherein the one or more processors, to receive the indication, are configured to receive the indication on a physical broadcast channel. 
     
     
         5 . The apparatus of  claim 4 , wherein the one or more processors, when receiving the indication, are configured to receive the indication in a master information block. 
     
     
         6 . The apparatus of  claim 5 , wherein the master information block indicates a polarization of a control resource set zero. 
     
     
         7 . The apparatus of  claim 4 , wherein the indication is encoded with scrambling sequences for bits of the physical broadcast channel. 
     
     
         8 . The apparatus of  claim 4 , wherein the indication is a demodulation reference signal sequence for the physical broadcast channel. 
     
     
         9 . The apparatus of  claim 1 , wherein the indication indicates a polarization from among polarizations that are orthogonal to one another. 
     
     
         10 . The apparatus of  claim 1 , wherein the one or more processors are configured to:
 determine an interpretation of the indicated polarization based at least in part on a receive antenna polarization; and   communicate using an antenna configuration that is based at least in part on the interpretation.   
     
     
         11 . The apparatus of  claim 10 , wherein the one or more processors, to determine the interpretation of the indicated polarization, are configured to measure a quality of a communication for each of a plurality of receive antenna polarizations and associate a receive antenna polarization with the indicated polarization based at least in part on quality measurements for the plurality of receive antenna polarizations. 
     
     
         12 . The apparatus of  claim 1 , wherein the one or more processors are configured to receive at least one SSB in a beam with the indicated polarization, and wherein the at least one SSB indicates a polarization for each of one or more control resource sets zero. 
     
     
         13 . The apparatus of  claim 1 , wherein the one or more processors are configured to determine a polarization of a control resource set zero to be a same polarization as the SSB. 
     
     
         14 . The apparatus of  claim 1 , wherein the one or more processors are configured to receive an indication of a polarization of an initial downlink bandwidth part and a polarization of an initial uplink bandwidth part in a system information block 1 (SIB1). 
     
     
         15 . The apparatus of  claim 1 , wherein the one or more processors are configured to:
 receive an indication of a polarization of a control resource set zero (CORESET#0); and   determine an indication of a polarization of an initial downlink bandwidth part and a polarization of an initial uplink bandwidth part based at least in part on one or more of the polarization of the CORESET#0 or the polarization of the at least one SSB.   
     
     
         16 . The apparatus of  claim 1 , wherein the one or more processors are configured to:
 receive, in system information, an indication of an SSB pattern of one or more of a time resource, a frequency resource, or a polarization; and   monitor for SSBs, SSB pairs, or SSB bursts based at least in part on the SSB pattern.   
     
     
         17 . The apparatus of  claim 16 , wherein each SSB pair of the SSB pairs includes an SSB with a first polarization and an SSB with a second polarization. 
     
     
         18 . The apparatus of  claim 16 , wherein the SSBs, SSB pairs, or SSB bursts have a specified polarization. 
     
     
         19 . The apparatus of  claim 16 , wherein the SSB bursts have alternating polarizations. 
     
     
         20 . An apparatus for wireless communication at a non-terrestrial network entity, comprising:
 a memory; and   one or more processors coupled to the memory, the one or more processors configured to:
 transmit an indication of a polarization of at least one synchronization signal block (SSB); and 
 transmit the SSB with the indicated polarization in a beam. 
   
     
     
         21 . The apparatus of  claim 20 , wherein the one or more processors, to transmit the indication, are configured to transmit the indication in a system information block. 
     
     
         22 . The apparatus of  claim 20 , wherein the one or more processors, to transmit the indication, are configured to transmit the indication on a physical broadcast channel. 
     
     
         23 . The apparatus of  claim 20 , wherein the SSB indicates a polarization for each of one or more control resource sets zero. 
     
     
         24 . The apparatus of  claim 20 , wherein the one or more processors are configured to transmit an indication of a polarization of a control resource set zero in a medium access control control element (MAC CE) or a radio resource control message. 
     
     
         25 . The apparatus of  claim 20 , wherein the one or more processors are configured to transmit an indication of a polarization of an initial downlink bandwidth part and a polarization of an initial uplink bandwidth part in a system information block 1 (SIB1). 
     
     
         26 . The apparatus of  claim 20 , wherein the one or more processors are configured to:
 transmit, in system information, an indication of an SSB pattern of one or more of time, frequency, or polarization; and   transmit SSBs, SSB pairs, or SSB bursts based at least in part on the SSB pattern.   
     
     
         27 . An apparatus for wireless communication at a user equipment (UE), comprising:
 a memory; and   one or more processors coupled to the memory, the one or more processors configured to:
 receive an indication of a polarization of a control resource set zero (CORESET#0) in one of a medium access control control element (MAC CE), a radio resource control message, or a master information block; and 
 configure one or more antennas for receiving the CORESET#0 based at least in part on the indicated polarization. 
   
     
     
         28 . The apparatus of  claim 27 , wherein the indication of the polarization of the CORESET#0 specifies the polarization of the CORESET#0. 
     
     
         29 . The apparatus of  claim 27 , wherein the indication of the polarization of the CORESET#0 includes one or more transmission configuration indicator (TCI) states that indicate a quasi-colocation (QCL) type, and wherein the one or more processors are configured to determine the polarization of the CORESET#0 based at least in part on the one or more TCI states. 
     
     
         30 . A user equipment (UE) for wireless communication, comprising:
 a memory; and   one or more processors coupled to the memory, the memory and the one or more processors configured to:
 receive beam footprint information for each of one or more beam footprints; 
 determine a respective polarization for each of the one or more beam footprints; and 
 communicate in a beam footprint of the one or more beam footprints using the respective polarization determined for the beam footprint.